From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hxqVD-0003qV-96 for barebox@lists.infradead.org; Wed, 14 Aug 2019 10:27:36 +0000 From: Oleksij Rempel Date: Wed, 14 Aug 2019 12:27:28 +0200 Message-Id: <20190814102729.23857-1-o.rempel@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v1 1/2] net: macb: init multiple dummy TX queues To: barebox@lists.infradead.org Cc: Oleksij Rempel Microchip SAMA5D27 has more then one TX queue. So it will go in to TX timeout if only one was initialized. Signed-off-by: Oleksij Rempel --- drivers/net/macb.c | 32 ++++++++++++++++++++++++++------ drivers/net/macb.h | 7 +++++++ 2 files changed, 33 insertions(+), 6 deletions(-) diff --git a/drivers/net/macb.c b/drivers/net/macb.c index a0411d6e4b..0b3c909433 100644 --- a/drivers/net/macb.c +++ b/drivers/net/macb.c @@ -322,6 +322,29 @@ static void macb_configure_dma(struct macb_device *bp) } } +static int gmac_init_dummy_tx_queues(struct macb_device *macb) +{ + int i, num_queues = 1; + u32 queue_mask; + + /* bit 0 is never set but queue 0 always exists */ + queue_mask = gem_readl(macb, DCFG6) & 0xff; + queue_mask |= 0x1; + + for (i = 1; i < MACB_MAX_QUEUES; i++) + if (queue_mask & (1 << i)) + num_queues++; + + macb->gem_q1_descs[0].addr = 0; + macb->gem_q1_descs[0].ctrl = MACB_BIT(TX_WRAP) | + MACB_BIT(TX_LAST) | MACB_BIT(TX_USED); + + for (i = 1; i < num_queues; i++) + gem_writel_queue_TBQP(macb, &macb->gem_q1_descs[0], i - 1); + + return 0; +} + static void macb_init(struct macb_device *macb) { unsigned long paddr, val = 0; @@ -357,16 +380,13 @@ static void macb_init(struct macb_device *macb) macb_writel(macb, TBQP, (ulong)macb->tx_ring); if (macb->is_gem && macb->gem_q1_descs) { - /* Disable the second priority queue */ - macb->gem_q1_descs[0].addr = 0; - macb->gem_q1_descs[0].ctrl = MACB_BIT(TX_WRAP) | - MACB_BIT(TX_LAST) | - MACB_BIT(TX_USED); + gmac_init_dummy_tx_queues(macb); + + /* Disable the second priority rx queue */ macb->gem_q1_descs[1].addr = MACB_BIT(RX_USED) | MACB_BIT(RX_WRAP); macb->gem_q1_descs[1].ctrl = 0; - gem_writel(macb, TQ1, (ulong)&macb->gem_q1_descs[0]); gem_writel(macb, RQ1, (ulong)&macb->gem_q1_descs[1]); } diff --git a/drivers/net/macb.h b/drivers/net/macb.h index fda4d08663..2e5b64e5e9 100644 --- a/drivers/net/macb.h +++ b/drivers/net/macb.h @@ -5,6 +5,8 @@ #ifndef __DRIVERS_MACB_H__ #define __DRIVERS_MACB_H__ +#define MACB_MAX_QUEUES 8 + /* MACB register offsets */ #define MACB_NCR 0x0000 #define MACB_NCFGR 0x0004 @@ -75,6 +77,8 @@ #define GEM_TQ1 0x0440 #define GEM_RQ1 0x0480 +#define GEM_TBQP(hw_q) (0x0440 + ((hw_q) << 2)) + /* Bitfields in NCR */ #define MACB_LB_OFFSET 0 #define MACB_LB_SIZE 1 @@ -436,4 +440,7 @@ struct macb_dma_desc { #define MACB_TX_USED_OFFSET 31 #define MACB_TX_USED_SIZE 1 +#define gem_writel_queue_TBQP(port, value, queue_num) \ + writel((value), (port)->regs + GEM_TBQP(queue_num)) + #endif /* __DRIVERS_MACB_H__ */ -- 2.20.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox